To get email notification when someone adds to a thread you're following, click on the star in the thread's header and it will turn yellow; click again to turn it off. To edit your profile, click on the gear.

The Wall has a powerful search engine that will go all the way back to 2002. Use "quotation marks" around multiple-word searches. RIGHT-CLICK on the results and choose Open Link In New Window so you'll be able to get back to your results. Happy searching!

In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.

LP gas in cold.....

weather. Is there an additive that LP suppliers add to the supply to get it to vaporize better during cold weather? Someone ran this one by me yesterday and is the first time I had ever heard of that....kcopp

There was a persistent low pressure shutdown during high loads. The supply to the building would literally go from 20# to 0# instantaneously. As soon as the boiler shut down due to low pressure, the supply would go back to 20# just as fast.

The propane company installed a vaporizer and the problem never reoccurred.

It never occurred to me before this post, I wonder how much energy the vaporizer uses?

the mix which makes up "LPG" can be changed -- more propane, less butane -- to have a higher vapour pressure at any given temperature. Perhaps this is what was being referred to?

The vapour pressure of butane drops to 1 atmosphere (0 psig) at -1 Celsius, but propane doesn't drop to 1 atmosphere until about -40 C. The suppliers change the mix to get a reasonable balance between vapourizing and pressure.

Jamie

Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.

methanol to get rid of possible moisture inside the tanks but it does not change the vaporization. Vaporization will always be less and less as the boiling point of propane is approached -40° F. The lower the volume of fuel and the amount of wet area also affects vaporization. With these extreme temperatures it can really be a tough time with LP.

As someone mentioned high demand can also be a problem so vaporizers are added to the system, they use the liquid as fuel to vaporize the liquid into a gas. The consumer pays for that, it is really just like a boiler.